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A receding chin is also known as retrogenia or a weak chin. Instead of jutting out or lying flat, a receding chin slopes back toward the neck. It happens when the lower jaw – or mandible – is ...
Instead, the chin was a byproduct of a shrinking face. Indeed, as the first modern humans evolved, late in the Pleistocene, the face decreased in size and tilted inward, pushing part of the lower ...